Diminutive diva SNOOKI – trapped in a world she never made – her FUTURE in-laws’ basement with still NO bling on her fing!

And now, at the rate things are going, the  “Jersey Shore” starlet may never get married!

The pint-size dynamo, her fiancé, Jionni LaValle, and their 10-month-old son, Lorenzo, have been living in the basement of her future in-laws’ home in Hanover, N.J., while waiting for construction on their new house to be finished.

BUT the tight quarters are starting to get to Snooki, 25, says a source, and she and Jionni, 26, have been at each other’s throats.

“The living arrangements have been hard on them,” said a source. “Snooki is hoping that once they move into their own place, they can get back to the business of being happy again.” The couple bought a parcel of land 10 minutes from where Jionni’s parents, Janis and Joe LaValle, live, but they agreed to put off their wedding until the house is built. Plans for the Tuscan Villa-style home include five bedrooms, six bathrooms, a big playroom, huge closets for Snooki’s ever-growing shoe collection, a pool, a patio and even a man cave for Jionni.

But insiders say construction is taking longer than anticipated, and that’s not sitting well with Snooki, whose real name is Nicole Polizzi.

“Snooki thinks Jionni is stalling because he loves being catered to by his mama, who cooks meals for the couple, baby-sits and even helps with their laundry,” said the source.

'If they don’t finish the new house soon, there could be trouble, but “the last thing she wants to do is break up their little family and wind up in a custody fight over their son.”